Diamond electrode with high ozone catalytic activity as well as preparation method and application thereof

A diamond electrode, catalytic activity technology, applied in the field of electrochemistry, can solve the problems of complex composition of medical wastewater

Active Publication Date: 2021-05-14
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of medical wastewater is very complex, most of which contain salt ions (such as Cl - ), because the strong oxidizing ion hydroxyl radicals produced in the electrolysis process of BDD will be oxidized to produce harmful substances such as perchloric acid, so it is necessary to reduce the generation of hydroxyl radicals and increase the ozone production

Method used

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  • Diamond electrode with high ozone catalytic activity as well as preparation method and application thereof
  • Diamond electrode with high ozone catalytic activity as well as preparation method and application thereof
  • Diamond electrode with high ozone catalytic activity as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1: Substrate pretreatment. Put a double-layer or triple-layer titanium mesh with a size of 3.5cm×7cm into 96mL (deionized water 90mL, concentrated sulfuric acid 6mL) of dilute sulfuric acid solution, and ultrasonically polish the surface for 30min. Then the titanium mesh was taken out, cleaned by ultrasonication in acetone and ethanol respectively for 5 minutes, the cleaned substrate was placed in diamond suspension and ultrasonicated for 30 minutes, and then blown dry with nitrogen at room temperature after taking it out.

[0055] Step 2: depositing boron doped diamond. Place the titanium mesh base on the abutment, keep the titanium mesh base in the middle of the hot wire and parallel to the hot wire, and the distance between the hot wire and the surface of the substrate is 20 mm. The pressure in the furnace is pumped down to below 0.1Pa, and then the reaction mixture gas is introduced. The gas introduced includes methane, hydrogen, and trimethylborane. Methane i...

Embodiment 2

[0060] Step 1: Substrate pretreatment. Put a double-layer or triple-layer titanium mesh with a size of 3.5cm×7cm into 96mL (deionized water 90mL, concentrated sulfuric acid 6mL) of dilute sulfuric acid solution, and ultrasonically polish the surface for 30min. Then the titanium mesh was taken out, cleaned by ultrasonication in acetone and ethanol respectively for 5 minutes, the cleaned substrate was placed in diamond suspension and ultrasonicated for 30 minutes, and then blown dry with nitrogen at room temperature after taking it out.

[0061] Step 2: depositing boron doped diamond. Place the titanium mesh base on the abutment, keep the titanium mesh base in the middle of the hot wire and parallel to the hot wire, and the distance between the hot wire and the surface of the substrate is 20 mm. The pressure in the furnace is pumped down to below 0.1Pa, and then the reaction mixture gas is introduced. The gas introduced includes methane, hydrogen, and trimethylborane. Methane i...

Embodiment 3

[0067] Step 1: Substrate pretreatment. Put a double-layer or triple-layer titanium mesh with a size of 3.5cm×7cm into 96mL (deionized water 90mL, concentrated sulfuric acid 6mL) of dilute sulfuric acid solution, and ultrasonically polish the surface for 30 minutes. Then the titanium mesh was taken out, cleaned by ultrasonication in acetone and ethanol respectively for 5 minutes, the cleaned substrate was placed in diamond suspension and ultrasonicated for 30 minutes, and then blown dry with nitrogen at room temperature after taking it out.

[0068] Step 2: depositing boron doped diamond. Place the titanium mesh base on the abutment, keep the titanium mesh base in the middle of the hot wire and parallel to the hot wire, and the distance between the hot wire and the surface of the substrate is 20mm. The pressure in the furnace is pumped down to below 0.1Pa, and then the reaction mixture gas is introduced. The gas introduced includes methane, hydrogen, and trimethylborane. Metha...

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Abstract

The invention discloses a diamond electrode with high ozone catalytic activity and a preparation method and application thereof. The diamond electrode comprises an electrode substrate; a first boron-doped diamond layer is arranged on the surface of the electrode substrate, or a transition layer is arranged on the surface of the electrode substrate, and the first boron-doped diamond layer is arranged on the surface of the transition layer; and a second boron-doped diamond layer is arranged on the surface of the first boron-doped diamond layer, and the second boron-doped diamond layer is of a porous multi-channel structure. The diamond electrode with high ozone catalytic activity is provided with the second boron-doped diamond layer with a porous multi-channel structure, due to the porous multi-channel reason of the electrode, a capillary phenomenon can occur, ozone is generated above a liquid level, and the problems of low ozone yield and low disinfection and sterilization efficiency during diamond catalysis are solved.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a diamond electrode with high ozone catalytic activity and its preparation method and application. Background technique [0002] The treatment of medical wastewater has always been a hot topic. There are not only various antibiotic organic substances in medical wastewater, but also viruses. At present, the commonly used medical wastewater treatment methods include adding strong oxidants such as chlorine-containing disinfectants and peroxide disinfectants. Most of these degradation methods contain chemical substances, and they cannot achieve the inactivation effect on some germs. Ozone is recognized as an effective bactericidal disinfectant, and is widely used in medical care, furniture sanitation and cleaning, and virus prevention and control. [0003] Boron-doped diamond (BDD) is a commonly used electrode for medical wastewater treatment. When boron-doped ...

Claims

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Application Information

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IPC IPC(8): C25B11/031C25B11/053C25B11/063C25B11/091C25B11/061C25B11/065C25B1/13C23C16/27C23C16/32C23C16/56C23C14/24C23C14/16C23C14/18C23C28/00C02F1/461C02F1/50A61L2/20A61L101/10
CPCC25B1/13C23C16/271C23C16/325C23C16/56C23C14/24C23C14/18C23C14/16C23C28/322C23C28/341C02F1/46109C02F1/50A61L2/202C02F2001/46133C02F2303/04C02F2103/003C02F2201/782
Inventor 杨扬李东唐永炳
Owner SHENZHEN INST OF ADVANCED TECH
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